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Product description 1. Display: Use of high definition LCD, letters is legible and striking, thick black, no shadow 2. Circuit board:anti-corrosion board, good conductivity, strong adhesion of carbon oil 3. IC fast: fast operation, low energy consumption 4. Button glue: theuse of new raw materials and refined high-quality silicone oil, feel morecomfortable 5. Line: Complywith American environmental standards. 6. Button batteries: more powerful, long life, easy to replace 7. The outer protective shell can avoid the keys being scratched and The antiskid silicone pads can not easy to slide